APA (7th ed.) Zitazioa
Hillson, D. (2009). Managing risk in projects. Gower.
Chicago Style (17th ed.) Zitazioa
Hillson, David. Managing Risk in Projects. Farnham: Gower, 2009.
MLA (9th ed.) Zitazioa
Hillson, David. Managing Risk in Projects. Gower, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.